from abc import ABC, abstractmethod
from typing import Dict, Any
from ..models import TestCase, Environment


class BaseHandler(ABC):
    """处理器基类"""
    
    def __init__(self, test_case: TestCase, environment: Environment):
        self.test_case = test_case
        self.environment = environment
        self.context = {}
    
    @abstractmethod
    def handle(self) -> Dict[str, Any]:
        """
        执行处理逻辑
        :return: 处理结果，可以包含变量等信息
        """
        pass


class DatabaseSetupHandler(BaseHandler):
    """数据库准备处理器"""
    
    def handle(self) -> Dict[str, Any]:
        """执行数据库准备操作"""
        setup_data = self.test_case.pre_conditions.get('database_setup', {})
        if not setup_data:
            return {}
            
        # TODO: 实现数据库操作逻辑
        # 这里需要根据实际需求实现数据库操作
        # 比如创建测试数据、清理数据等
        
        return {
            'db_records': {}  # 返回创建的数据记录信息
        }


class DataCleanupHandler(BaseHandler):
    """数据清理处理器"""
    
    def handle(self) -> Dict[str, Any]:
        """执行数据清理操作"""
        cleanup_data = self.test_case.pre_conditions.get('data_cleanup', {})
        if not cleanup_data:
            return {}
            
        # TODO: 实现数据清理逻辑
        # 这里需要根据实际需求实现数据清理操作
        
        return {
            'cleaned_data': {}  # 返回清理的数据信息
        }


class VariableSetupHandler(BaseHandler):
    """变量准备处理器"""
    
    def handle(self) -> Dict[str, Any]:
        """准备测试变量"""
        variables = self.test_case.pre_conditions.get('variables', {})
        if not variables:
            return {}
            
        # 处理变量设置
        processed_variables = {}
        for key, value in variables.items():
            # TODO: 实现变量处理逻辑
            # 可以支持从文件、环境变量等获取变量值
            processed_variables[key] = value
            
        return {
            'variables': processed_variables
        }


class LoggingHandler(BaseHandler):
    """日志处理器"""
    
    def handle(self) -> Dict[str, Any]:
        """记录测试日志"""
        # TODO: 实现日志记录逻辑
        # 可以记录到文件、数据库等
        return {
            'log_info': {}
        }


class NotificationHandler(BaseHandler):
    """通知处理器"""
    
    def handle(self) -> Dict[str, Any]:
        """发送测试通知"""
        notification_config = self.test_case.pre_conditions.get('notifications', {})
        if not notification_config:
            return {}
            
        # TODO: 实现通知逻辑
        # 可以支持邮件、钉钉、企业微信等通知方式
        return {
            'notification_status': 'sent'
        }


class HandlerFactory:
    """处理器工厂"""
    
    _handlers = {
        'database_setup': DatabaseSetupHandler,
        'data_cleanup': DataCleanupHandler,
        'variable_setup': VariableSetupHandler,
        'logging': LoggingHandler,
        'notification': NotificationHandler
    }
    
    @classmethod
    def get_handler(cls, handler_type: str, test_case: TestCase, environment: Environment) -> BaseHandler:
        """
        获取处理器实例
        :param handler_type: 处理器类型
        :param test_case: 测试用例
        :param environment: 执行环境
        :return: 处理器实例
        """
        handler_class = cls._handlers.get(handler_type)
        if not handler_class:
            raise ValueError(f"未知的处理器类型: {handler_type}")
        return handler_class(test_case, environment) 